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Communication Manager Maintenance-Object Repair Procedures
774 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
Figure 39: AC Power Distribution in Multicarrier Cabinets
Power Backup
If AC power fails, three 48-V DC batteries power the system for:
● 15 seconds in a PN cabinet
● 10 minutes in the expansion control carrier in the “A” position of a PN cabinet
Uninterruptible Power Supply
An external UPS provides a longer backup time than holdover batteries and can replace the
batteries and battery charger. The unit connects from the AC power source to a cabinet’s AC
power cord. If AC power fails, the unit supplies its own AC power to the cabinet.
3
2
"C" Position
Carrier
"B" Position
Carrier
"A" Position
Carrier
"D" Position
Carrier
Battery
Charger
(Optional)
"E" Position
Carrier
"F" Position
Fan Unit
Power
Distribution
Unit
mcc4_g3 RBP 041696